CN112332664B - Low-power-consumption standby circuit method for power battery monitoring power supply of pure electric vehicle - Google Patents
Low-power-consumption standby circuit method for power battery monitoring power supply of pure electric vehicle Download PDFInfo
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- CN112332664B CN112332664B CN202011127253.7A CN202011127253A CN112332664B CN 112332664 B CN112332664 B CN 112332664B CN 202011127253 A CN202011127253 A CN 202011127253A CN 112332664 B CN112332664 B CN 112332664B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
- H02M1/0035—Control circuits allowing low power mode operation, e.g. in standby mode using burst mode control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A low-power consumption standby method and a circuit applied to a power battery monitoring power supply of a pure electric vehicle are provided. The power supply management system mainly comprises a power supply circuit and an auxiliary power supply management chip, wherein a switch circuit is also arranged between the power supply circuit and the auxiliary power supply management chip and can control the power supply circuit to supply power to the auxiliary power supply management chip when needed; the switching circuit mainly comprises a first switching tube, a second switching tube and a timing clock chip, wherein the output voltage of the power circuit is connected with the source electrode of the first switching tube through a diode, a resistor is connected between the source electrode of the first switching tube and the grid electrode of the first switching tube, the drain electrode of the first switching tube is connected with the power supply of the auxiliary power management chip, the grid electrode of the first switching tube is connected with the drain electrode of the second switching tube through a diode, and the grid electrode of the second switching tube is connected with 5V of the power circuit through a resistor; and a pull-up resistor is arranged between the power supply of the timing clock chip and the interrupt pin, and the interrupt pin is electrically connected with the source electrode of the second switching tube.
Description
Technical Field
The invention relates to the field of new energy automobiles, in particular to a low-power-consumption standby method and a low-power-consumption standby circuit applied to a power battery monitoring power supply of a pure electric automobile.
Background
The electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels by a motor to run, and meets various requirements of road traffic and safety regulations. It is powered using electricity stored in a battery. Sometimes 12 or 24 batteries are used when driving a car, sometimes more is needed. In the pure electric new energy automobile, the cost of the power battery occupies about 1/2 of the cost of the whole automobile, and the power battery belongs to the pure electric automobile and important parts thereof. If the power battery is in a power shortage state, the power battery can be irreversibly damaged or even loses efficacy, and the whole vehicle can be greatly lost. Therefore, the pure electric vehicle is generally provided with a power battery monitoring power supply which has a timing self-awakening function and supplies power to a BMS (battery management system) after awakening, so that the BMS can detect power battery information and report the power battery information to a background for monitoring. Since the power supply of the monitoring power supply is provided by the power battery and is not powered off from the date of finished automobile delivery, the standby power consumption of the monitoring power supply needs to be as small as possible.
In the prior art, a power battery monitoring power supply is in a standby state when no enable signal is input, and only when an enable signal is given or self-awakening time is reached, the power battery monitoring power supply exits from the standby state and enters an awakening working state. However, in standby, the monitoring power supply needs to realize a timing function, a timing function circuit needs to be converted from a high-voltage level of the power battery to a proper 5V low level, a special conversion circuit is needed in the conversion process, the most circuits used in the industry are single-ended flyback circuits (the circuits convert a high-voltage 800V voltage to a low-voltage 5V level), the power consumption in standby is realized by applying the circuits, the lowest power consumption is about 1.5W, the power consumption is obviously too high for the power battery, the loss is caused, and for a long-term dead pure electric vehicle, the power battery is insufficient, the battery is damaged, and the vehicle cannot be started.
Therefore, in order to reduce the standby power consumption of the battery pack, a low-power standby circuit which can be applied to a monitoring power supply of a power battery of a pure electric vehicle is urgently needed. The defect of high power consumption when the monitoring power supply is in standby is overcome.
Disclosure of Invention
In order to solve the above problems, a primary objective of the present invention is to provide a low power consumption standby method and a circuit thereof for a monitoring power supply of a power battery of a pure electric vehicle, which can greatly reduce standby power consumption and reduce power shortage of the power battery caused by excessive standby power consumption.
In order to achieve the purpose, the invention provides a low-power consumption standby circuit applied to a power battery monitoring power supply of a pure electric vehicle, which mainly comprises a power circuit and an auxiliary power management chip (U1), and is characterized in that a switch circuit is also arranged between the power circuit and the auxiliary power management chip, and the switch circuit can control the power circuit to supply power to the auxiliary power management chip U1 when needed;
the switching circuit mainly comprises a first switching tube (Q1), a second switching tube (Q2) and a timing clock chip (U2), wherein the output voltage of the power circuit is connected with the source (S) of the first switching tube (Q1) through a diode D2, a resistor (R3) is connected between the source (S) of the first switching tube (Q1) and the gate (G), the drain (D) of the first switching tube (Q1) is connected with the power supply (VCC) of the auxiliary power management chip (U1), the gate (G) of the first switching tube (Q1) is connected with the drain (D) of the second switching tube (Q2) through a diode (D3), and the gate (G) of the second switching tube (Q2) is connected with 5V of the power circuit through a resistor R4;
a pull-up resistor (R5) is arranged between a power supply (VDD) of the timing clock chip (U2) and an interrupt pin (INT), and the interrupt pin (INT) is electrically connected with a source electrode (S) of the second switch tube (Q2).
Preferably, the standby circuit can turn off the first switch tube (Q1) when the monitoring power supply is in standby, so as to power off the auxiliary power management chip (U1).
Preferably, the power circuit comprises voltage dividing resistors (R1, R2), a voltage stabilizing diode D1, an electrolytic capacitor (CD1) and a voltage stabilizing chip (V1), the input of the power circuit is connected with the power battery, the voltage dividing resistors (R1, R2) and the voltage stabilizing diode D1 are connected between the input voltage end and the Ground (GND) in series, and the voltage stabilizing diode D1 is connected with the electrolytic capacitor (CD1) in parallel;
the input voltage is divided by voltage dividing resistors (R1, R2) and a voltage stabilizing diode D1, and then is connected to a voltage stabilizing chip (V1) to convert the voltage into 5V level. And because the voltage stabilizing diode D1 is a voltage stabilizing tube of 16V and the electrolytic capacitor CD1 is connected with the voltage stabilizing tube in parallel, the voltage Ucd1 of the electrolytic capacitor CD1 is 16V, namely the output voltage is 16V.
Pins SCL and SDA of the timing chip U2 are used to receive external data, so as to distinguish between standby and awake states according to the data timing requirement.
The invention also provides a low-power consumption standby method applied to a monitoring power supply of a power battery of a pure electric vehicle, which is applied to the circuit of any claim, and the control method comprises the following steps: when the monitoring power supply is in a standby state, an interrupt pin INT of a clock chip (U2) is 5V due to the action of external 5V and a pull-up resistor (R5), and a grid electrode (G) of a second switching tube Q2 is also 5V, and the grid electrode of the second switching tube Q2 is also connected with the external 5V through a series resistor R4, so that the grid electrode of the second switching tube Q2 is also 5V, at the moment, the second switching tube Q2 is switched off, and further the grid source electrode of the first switching tube Q1 cannot be charged, so that the first switching tube Q1 is also switched off, a power supply pin 7 of an auxiliary power supply management chip (U1) cannot supply power, and a flyback circuit cannot work, so that loss is reduced;
the timing chip (U2) starts timing from the standby time of the monitoring power supply, the wakeup time is up, the timing chip interrupt pin (INT) outputs low level, at the moment, the grid electrode of the second switch tube (Q2) is low level, 5V charges the grid source electrode of the second switch tube (Q2) through a resistor R4, the second switch tube is conducted, the cathode of a diode D3 is pulled down to GND, at the moment, a capacitor (CD1) charges the grid source electrode of the first switch tube Q1 through a diode D2, a resistor R3 and a diode D3, the drain source electrode of the capacitor is conducted, and the capacitor (CD1) supplies power to the auxiliary power supply management chip (U1) through a diode D2 and the first switch tube (Q1), so that the monitoring power supply is awakened to enter normal work;
therefore, the process from standby to wake-up is completed, when the standby is needed, the interrupt pin (INT) of the timing chip (U2) outputs high level, the first switch tube (Q2) and the second switch tube (Q1) are both turned off, the power supply of the auxiliary power management chip U1 is disconnected, and the monitoring power supply enters a dormant state.
The invention has the beneficial effects that by means of the technical scheme, the ultralow power consumption standby circuit is provided, and the maximum standby power consumption of the circuit is less than 60 mW. The standby circuit for monitoring the power supply is realized by only using 1 LDO chip (low dropout linear regulator), 1 RTC chip (real-time clock chip) and some simple peripheral devices, so that the standby power consumption can be greatly reduced, and the power shortage of the power storage battery caused by the overlarge standby power consumption is reduced.
Drawings
Fig. 1 is a low-power-consumption standby circuit applied to a monitoring power supply of a power battery of a pure electric vehicle.
Wherein:
V in power battery input (high voltage 800V)
U1 auxiliary power supply management chip
U2 clocks the clock chip.
R1, R2 resistance
D1 zener diode
CD1 electrolytic capacitor
Ucd1 voltage of electrolytic capacitor CD1
D2 diode
Q1 MOS pipe.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Through careful analysis, in order to solve the low power consumption state during standby, the invention needs to solve the following five problems:
1) in standby, the main loss section (internal supply) is switched off; so as to realize low loss in standby;
2) but the problem that the interior can work again when the product works normally (otherwise, the power consumption is low all the time, the product cannot work normally, and the value of the product is lost) needs to be solved;
3) since it is necessary to determine or judge the standby and power-on states, a judgment mechanism is needed inside;
4) if a mechanism capable of judging is needed, power supply needs to be provided inside, and when the power supply is disconnected, extra power supply needs to be provided, and special treatment is needed: 1. the power supply voltage cannot be too high to damage internal devices, and cannot be too low to meet the normal power supply requirement;
2. the loss of the part of power supply needs to be designed, and the loss existing in a standby state (internal power supply is cut off) is actually the loss generated by the power supply need of a judgment mechanism; the loss is too large to realize low power consumption in a standby state; the loss is too small to meet the power supply requirement;
5) to achieve as low a power consumption as possible, it is necessary to select devices with as low a power requirement as possible and suitable for the judgment and control (with suitable voltage and power requirements)
Therefore, the inventor provides the low-power-consumption standby circuit applied to the pure electric vehicle power battery monitoring power supply.
The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
The low-power-consumption standby circuit applied to the power battery monitoring power supply of the pure electric vehicle is a hardware circuit and can realize low power consumption of the power battery monitoring power supply during standby. The circuit schematic diagram is shown in fig. 1.
The invention discloses a low-power-consumption standby circuit applied to a monitoring power supply of a power battery of a pure electric vehicle, which mainly comprises a 5V voltage-stabilizing chip V1, a timing clock chip U2, an auxiliary power management chip U1, an MOS tube Q1 (a first switch tube) and an MOS tube Q2 (a second switch tube).
The power supply circuit mainly comprises a 5V voltage stabilizing chip V1, and converts the voltage input by a power battery into 16V voltage for outputting and supplying power to a timing clock chip U2;
as shown in fig. 1, the 16V output voltage of the power circuit is electrically connected to the auxiliary power management chip U1 through a diode D2 and a MOS transistor Q1, and the timing clock chip U2 controls the Q1 to turn on and off to supply power to the auxiliary power management chip U1 when necessary.
The 16V output voltage of the power circuit is connected with the source S of the first switch tube Q1 through the diode D2, a resistor R3 is connected between the source S and the grid G of the first switch tube Q1, the drain D of the first switch tube Q1 is connected with the power VCC of the auxiliary power management chip U1, the source S of the first switch tube Q1 is connected with the drain D of the second switch tube Q2 through the diode D3, and the grid G of the second switch tube Q2 is connected with the 5V of the power circuit through the resistor R4.
A pull-up resistor R5 is disposed between the power VDD of the timing clock chip U2 and the interrupt pin INT, and the interrupt pin INT is electrically connected to the source S of the second switch Q2.
In this embodiment, the first switching transistor Q1 with switching function is selected as a P-channel MOS transistor. The first switch tube Q1 can be turned off when the monitoring power supply is in standby, so that the auxiliary power management chip U1 (flyback circuit control chip) is powered off when in standby, and thus, in the standby loss of the whole monitoring power supply, the loss caused by the flyback circuit is removed, and the standby loss is greatly reduced.
The timing clock chip U2 controls the second switching MOS transistor Q2 (typically an N-channel MOS) through an off pin INT and a pull-up resistor R2 to turn on and off the first switching transistor Q1.
The specific working mode of the circuit is as follows: the power battery inputs high voltage 800V, voltage is divided by resistors R1 and R2 and a voltage stabilizing diode D1, the voltage stabilizing diode D1 is a 16V voltage stabilizing tube, and an electrolytic capacitor CD1 is connected with the voltage stabilizing tube in parallel, so that the voltage Ucd1 of the electrolytic capacitor CD1 is 16V. One path of the voltage is connected to a voltage stabilizing chip V1, the 16V level is converted into a 5V level, and power is supplied to a power supply timing clock chip U2; the other path is connected to a diode D2 and a MOS transistor Q1 and supplies power to the auxiliary power management chip U1. Q1 is generally selected to be a P-channel MOS transistor with switching function. The purpose of selecting Q1 is to turn off Q1 when the monitoring power supply is in standby by using the switching function of the monitoring power supply, so that the auxiliary power supply management chip U1 (flyback circuit control chip) is powered off when in standby, the loss caused by a flyback circuit can be removed in the standby loss of the whole monitoring power supply, and the standby loss can be greatly reduced. The device that controls the Q1 to turn on and off is the clocked clock chip U2.
The specific control mode is as follows:
when the monitoring power supply is in standby, the interrupt pin INT of the clock chip U2 is acted by the external 5V and the pull-up resistor R5, the S of the MOS transistor Q2 (generally, N-channel MOS is selected) is 5V, and the gate of Q2 is also connected by the external 5V series resistor R4, so the gate of Q2 is also 5V, and at this time, Q2 is turned off. Due to the fact that the Q2 is turned off, the grid electrode and the source electrode of the Q1 cannot be charged, the Q1 is also turned off, and therefore the pin 7 of the U1 power supply pin cannot supply power, the flyback circuit cannot work, and loss is reduced.
The timing chip U2 starts timing from the standby time of the monitoring power supply, when the wake-up time is up, the timing chip interrupt pin INT outputs a low level, at this time, the S of the Q2 is at a low level, so 5V charges the grid source of the Q2 through R4, the Q2 is conducted, the cathode of the diode D3 is pulled down to GND, at this time, the capacitor CD1(16V) can charge the grid source of the Q1 through the D2, the R3 and the D3, and at this time, the drain source of the Q1 is conducted. At this time, the power of the CD1 is supplied to the U1 through the D2 and the Q1, and at this time, the monitoring power supply is awakened to be in normal operation. The timing chip U2 receives external data through pins SCL and SDA, and distinguishes between standby and awake states according to the data timing requirement. Is used in this particular embodiment by I 2 The C bus is in data transmission with a main control chip (such as a DSP chip) of the product.
In addition, if the requirement on cost is not high, the chip can be combined with practical application, and the chip can be replaced by an MCU or DSP chip of other products (the actual power consumption is directly related to the power consumption of the selected chip).
Therefore, the process from standby to wake-up is completed, when the standby is needed, the interrupt pin INT of the timing chip U2 outputs high level, the Q2 and the Q1 are both turned off, the power supply of the U1 is cut off, and the monitoring power supply enters a sleep state.
Calculating the standby power consumption: vin (Vin-16)/(R1+ R2) 800 × 786/12000000 — 52.26 mW.
Therefore, the standby loss of the circuit is reduced to 52.26mW from 1.5W, and the standby loss of the power battery is greatly reduced, and the power shortage risk of the power battery is reduced.
In order to solve the problem of standby power consumption, the power consumption of the power battery monitoring power supply in standby is not more than 60mW due to the specially designed low-power-consumption standby circuit. The standby power consumption is reduced to about 3.75 percent of the original standby power consumption, so that the standby power consumption is greatly reduced.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A low-power consumption standby circuit applied to a pure electric vehicle power battery monitoring power supply mainly comprises a power supply circuit and an auxiliary power supply management chip (U1), and is characterized in that a switch circuit is also arranged between the power supply circuit and the auxiliary power supply management chip and can control the power supply circuit to supply power to the auxiliary power supply management chip (U1) when needed;
the switching circuit mainly comprises a first switching tube (Q1), a second switching tube (Q2) and a timing clock chip (U2), wherein the output voltage of the power circuit is connected with the source (S) of the first switching tube (Q1) through a diode D2, a resistor R3 is connected between the source (S) and the grid (G) of the first switching tube (Q1), the drain (D) of the first switching tube (Q1) is connected with the power supply (VCC) of the auxiliary power management chip (U1), the grid (G) of the first switching tube (Q1) is connected with the drain (D) of the second switching tube (Q2) through a diode D3, and the grid (G) of the second switching tube (Q2) is connected with 5V of the power circuit through a resistor R4;
a pull-up resistor (R5) is arranged between a power supply (VDD) of the timing clock chip (U2) and an interrupt pin (INT), and the interrupt pin (INT) is electrically connected with a source electrode (S) of the second switch tube (Q2).
2. The low-power-consumption standby circuit applied to the monitoring power supply of the power battery of the pure electric vehicle as claimed in claim 1, wherein the standby circuit can turn off the first switch tube (Q1) to power off the auxiliary power management chip (U1) when the monitoring power supply is in standby.
3. The low-power-consumption standby circuit applied to the monitoring power supply of the power battery of the pure electric vehicle as claimed in claim 1 or 2, wherein the power circuit comprises voltage dividing resistors (R1, R2), a voltage stabilizing diode D1, an electrolytic capacitor (CD1) and a voltage stabilizing chip (V1), the input of the power circuit is connected with the power battery, the voltage dividing resistors (R1, R2) and the voltage stabilizing diode D1 are connected in series between an input voltage end and the Ground (GND), and the voltage stabilizing diode D1 is connected in parallel with the electrolytic capacitor (CD 1);
the input voltage is divided by voltage dividing resistors (R1, R2) and a voltage stabilizing diode D1, and then is connected to a voltage stabilizing chip (V1) to convert the voltage into 5V level.
4. The low-power-consumption standby circuit applied to the monitoring power supply of the power battery of the pure electric vehicle as claimed in claim 3, wherein the zener diode D1 is a 16V zener diode.
5. A low-power consumption standby method applied to a pure electric vehicle power battery monitoring power supply is applied to the circuit of any claim, and is characterized in that: when the monitoring power supply is in a standby state, an interrupt pin (INT) of a timing clock chip (U2) is under the action of external 5V and a pull-up resistor (R5), a grid electrode (G) of a second switching tube (Q2) is 5V, and a grid electrode of the second switching tube (Q2) is also connected with the external 5V through a series resistor R4, so that a grid electrode of the second switching tube (Q2) is also 5V, at the moment, the second switching tube (Q2) is turned off, further, the grid source electrode of the first switching tube (Q1) cannot be charged, the first switching tube (Q1) is also turned off, a power supply pin 7 of an auxiliary power management chip (U1) cannot supply power, and a flyback circuit cannot work, so that loss is reduced;
the timing clock chip (U2) starts timing from the standby time of the monitoring power supply, the wakeup time is up, the timing chip interrupt pin (INT) outputs low level, at the moment, the grid electrode of the second switch tube (Q2) is low level, 5V charges the grid source electrode of the second switch tube (Q2) through a resistor R4, the timing chip interrupt pin (INT) is conducted, the cathode of a diode D3 is pulled down to be Ground (GND), at the moment, a capacitor (CD1) charges the grid source electrode of the first switch tube (Q1) through a diode D2, a resistor R3 and a diode D3, so that the drain source electrode and the conduction are achieved, and the capacitor (CD1) supplies power to the auxiliary power supply management chip (U1) through a diode D2 and the first switch tube (Q1), so that the monitoring power supply is awakened to enter normal work;
therefore, the process from standby to wake-up is completed, when the standby is needed, the interrupt pin (INT) of the timing clock chip (U2) outputs high level, the first switch tube (Q2) and the second switch tube (Q1) are both turned off, the power supply of the auxiliary power management chip (U1) is disconnected, and the monitoring power supply enters a dormant state.
6. The low-power-consumption standby method applied to the monitoring power supply of the power battery of the pure electric vehicle as claimed in claim 5, wherein the timing clock chip (U2) receives external data through pins SCL and SDA, and performs state discrimination between standby and wake-up according to the timing requirement of the received data.
7. A low-power consumption standby method applied to a pure electric vehicle power battery monitoring power supply according to claim 6, characterized in that the external number isAccording to the following formula I 2 And the C bus and the product main control chip carry out data transmission.
8. The low-power-consumption standby method applied to the monitoring power supply of the power battery of the pure electric vehicle as claimed in claim 7, wherein the product main control chip is a DSP chip or an MCU chip.
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| CN114290900A (en) * | 2022-01-21 | 2022-04-08 | 石家庄通合电子科技股份有限公司 | BMS system power supply unit and electric automobile |
| CN114655071A (en) * | 2022-02-18 | 2022-06-24 | 华为数字能源技术有限公司 | Battery, battery control method and electric vehicle |
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| JP2000341940A (en) * | 1999-05-27 | 2000-12-08 | Lg Electronics Inc | Low power consumption standby power supply circuit |
| TWI317866B (en) * | 2006-05-18 | 2009-12-01 | Qisda Corp | Electronic device with standby function, standby power supply system and method thereof |
| CN203745837U (en) * | 2014-02-28 | 2014-07-30 | 山东昌润科技有限公司 | Instrument and meter micro-power consumption circuit |
| CN205791612U (en) * | 2016-05-24 | 2016-12-07 | 九阳股份有限公司 | A kind of low-power dissipation power supply control circuit |
| CN206650446U (en) * | 2017-01-05 | 2017-11-17 | 深圳拓邦股份有限公司 | A kind of low-power consumption standby circuit of BMS |
| CN209297244U (en) * | 2019-01-30 | 2019-08-23 | 广州鲁邦通物联网科技有限公司 | A kind of industrial personal computer timed power on/off circuit |
| CN110588542B (en) * | 2019-09-09 | 2023-04-28 | 洛阳嘉盛电源科技有限公司 | Control circuit and control method for low-power-consumption self-awakening of vehicle-mounted power supply |
| CN210404788U (en) * | 2019-09-24 | 2020-04-24 | 喜临门家具股份有限公司 | Power supply circuit for preventing over-discharge and electronic equipment |
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2020
- 2020-10-20 CN CN202011127253.7A patent/CN112332664B/en active Active
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